12-13-2016, 10:58 PM
https://www.youtube.com/watch?v=uc-Mo8hMgME
Time index 1:00
They mention the XA element. The 24-70mm has one. Of course ... the 24-70mm still has two conventional aspherical elements as well ..
Time index 1:00
They mention the XA element. The 24-70mm has one. Of course ... the 24-70mm still has two conventional aspherical elements as well ..